Improved molecular diagnosis of patients with neonatal diabetes using a combined next-generation sequencing and MS-MLPA approach

Journal of Pediatric Endocrinology & Metabolism : JPEM
G Alkorta-AranburuD Del Gaudio

Abstract

We evaluated a methylation-specific multiplex-ligation-dependent probe amplification (MS-MLPA) assay for the molecular diagnosis of transient neonatal diabetes mellitus (TNDM) caused by 6q24 abnormalities and assessed the clinical utility of using this assay in combination with next generation sequencing (NGS) analysis for diagnosing patients with neonatal diabetes (NDM). We performed MS-MLPA in 18 control samples and 42 retrospective NDM cases with normal bi-parental inheritance of chromosome 6. Next, we evaluated 22 prospective patients by combining NGS analysis of 11 NDM genes and the MS-MLPA assay. 6q24 aberrations were identified in all controls and in 19% of patients with normal bi-parental inheritance of chromosome 6. The MS-MLPA/NGS combined approach identified a genetic cause in ~64% of patients with NDM of unknown etiology. MS-MLPA is a reliable method to identify all known 6q24 abnormalities and comprehensive testing of all causes reveals a causal mutation in ~64% of patients.

References

Mar 30, 2017·Journal of Pediatric Endocrinology & Metabolism : JPEM·Ranjit I KylatMohammed Y Bader
Apr 17, 2020·Genetics in Medicine : Official Journal of the American College of Medical Genetics·D Del GaudioACMG Laboratory Quality Assurance Committee
Oct 19, 2019·World Journal of Clinical Cases·Yu-Xia Zhan, Guang-Hua Luo
Apr 26, 2020·Journal of Neonatal-perinatal Medicine·T O Yahaya, D A Anyebe

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Related Concepts

Neonatal Diabetes Mellitus
Protein Methylation
Molecular Diagnosis
Chromosomes, Human, Pair 6
Gene Amplification Technique
Etiology
Genetic Inheritance
6q24
Massively-Parallel Sequencing
Methylation

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